Parmotrema hypoleucinum

Thallus foliose, epiphyte, 3-15 cm diameter, very loosely attached. Lobes irregular, grey with blackened areas, white maculate; margins undulate with black cilia; soralia marginal. Lower surface white, without rhizines.
Reproduction: soreida.
Photobiont: Trebouxia.

Spot test: upper cortex K+ yellow, medulla K+ yellow turning orange, P+ orange.
Chemistry: upper cortex with atranorin and chloroatranorin; medulla with stictic acid and constictic and norstictic acids.

Habitat: On trunks and branches of coastal pine and cork oak forest.
Distribution: Pantropical an pantemperate.

Position in classification:
Parmeliaceae, Lecanorales, Lecanoromycetidae, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi.

Locality data:
Location: Creu de Rupit, Arenys de Munt, Parc del Montnegre i el Corredor (Maresme).
Ecology: On Pinus radiata.
Altitude: 423 m.
Climate: Littoral Mediterranean (Tmm=13ºC ΔT=16ºC, 700 mm).

Included in the red list of lichens of Catalonia, with the VU vulnerable classification.